If you are close enough to Nottingham East Midlands I can highly recommend East Midlands Flight Instructor School.
Alan Cooper is the instructor and he delivers highly interesting briefs and his experience is second to none.
Give him a call, his advert is in Flyer. the course lasts approximately 4 weeks, Mon - Thu but he can tie in extra days if the weather is against you or illness strikes. Also his prices are some of the best value for money around. What you pay includes everything!